Slide fastener



FIG. 1 is a front elevational view of a slide fastener showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof.

The broken lines shown in FIGS. 1, 2 and 3 are for ease of illustration. 

The ornamental design for a slide fastener, substantially as shown and described. 